package com.hejing.cloud.config;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.cloud.loadbalancer.annotation.LoadBalancerClient;
import org.springframework.cloud.loadbalancer.core.RandomLoadBalancer;
import org.springframework.cloud.loadbalancer.core.ReactorLoadBalancer;
import org.springframework.cloud.loadbalancer.core.ServiceInstanceListSupplier;
import org.springframework.cloud.loadbalancer.support.LoadBalancerClientFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.env.Environment;
import org.springframework.web.client.RestTemplate;

/**
 * ClassName: RestTemplateConfig
 * Package: com.hejing.cloud.config
 * Description:
 *      负载均衡算法由 轮询切换为 随机
 * @Author: HeJing
 * @Create: 2024-08-03 13:46
 * @Version: 1.0
 */
@Configuration
@LoadBalancerClient(value = "cloud-payment-service", configuration = RestTemplateConfig.class)
public class RestTemplateConfig {

    @Bean
    @LoadBalanced //使用@LoadBalanced注解赋予RestTemplate负载均衡的能力
    public RestTemplate restTemplate(){
        return new RestTemplate();
    }

    @Bean
    ReactorLoadBalancer<ServiceInstance> randomLoadBalancer(Environment environment,
                                                            LoadBalancerClientFactory loadBalancerClientFactory) {
        String name = environment.getProperty(LoadBalancerClientFactory.PROPERTY_NAME);

        return new RandomLoadBalancer(loadBalancerClientFactory.getLazyProvider(name,
                ServiceInstanceListSupplier.class), name);
    }
}






































